Tipping gravity davit for lifeboats



1945- A. PAMPINELLA TIPPING GRAVITY DAVIT FOR LIFEBOATS Filed Nov. 6.1941 3 Sheets-Sheet 1 INVENTOR A. PAMP/NELLA ATTORNEY.

Oct. 2, 1945- A. PAMPINELLA TIPPING GRAVITY DAVIT FOR LIFEBOATS FiledNov. 6, 5.941 V 3 Sheets-Sheet 2 Mkunk INVENTOR A-PAMPINELLA A'ITORNEY.

. 2, 1945. A. PAMPINELLA I TIPPING GRAVITY DAVIT FOR LIFEBOATS 3Sheets-Sheet 3 Filed Nov. 6, 1941 INVENTOR A. PAMPl/VELLA ATTORNEY.

' Patented Oct. 2, 1945 v EJ- :or-FICE',

This invent-ion.relates to pertain, improvements in the tipping gravitydavits-tor lifeboats, as disclosed in United IStatesPaten-t Number2,305,457, granted December15, 194 2..

One of the objects of thisiinvention -to:dis pense .with the guy. ropes:for. the auxiliary beam ofeach .oftthe davits, and to dispense; withthe small. removable tackle serving to causetheinward tipping movement.of thebeam and davit..-

Another object .of .these improvements .isto provide a better supportfor the. auxiliary beams when the companion of .the (ship. issufficiently nearthedevicea A further object of .the --,inv,ention..istoprovide a more suitable shape o f;. davit, said shapebeing such as.tocause .the boat, when fully withdrawn from the ships "side, to bekept in anupright position and not inclined.

In .--addition :to the -main- -objects as hereinbefore described, thisinvention provides a lighter davit device, both in the single boat typesand in the types for two superposed boats.

In the annexed drawings:

Fig. 1 shows a side view of an adjusting screw system for controllingthe auxiliary beam of each elementary davit;

Fig. 2 shows a front view of the system of Fig. 1;

Fig. 3 shows a side view of a different shape of davit, as well as adifferent arrangement of the screw system;

Fig. 4 shows a side View of a davit formed by tubes located beyond theends of the boat, instead of being placed laterally of the boat as shownin the previous figures;

Fig. 5 shows a front view of the arrangement of Fig. 4;

Fig. 6 shows a side View of another embodiment, two boats being gravityoperated;

Fig. 7 shows a front view of the arrangement of Fig. 6.

It will be understood that the kind, shape and arrangement of the partswhich make up the devices according to the improvements herein disclosedmay be largely varied, Without departing from the scope of theinvention, provided that the essential features, as set forth in thisspecification, are not altered.

The first of the improvements consists in the auxiliary beam I, for eachof the two davits 4 (Fig. 1), adjusted by the screw system 2 which ismounted on a trestle 3 on the deck l3 on which the beams I and davits 4are pivoted on pivots 22. This screw system 2 serves both as a tensionand compression member for the beams l, and

the position of the latter is controlled by screw.- m or u scr in uthewemb ment shown in Fig-,1 .the normaltr-impf the davits tin which 47116boat. 5 is. suspended and partially protrudes .iremthe ships side .6, ismain.- tain' hen h sce i sully u s r w dth latte; on the contrarybeingscrewed in rte-Eacempl js -thezin ea d t pin mo me t eam land-davit (dotted lines). Thereverse: takes place in the embodiments-ofFigs. .3 and; 6, .accordin t which bo im n s h ts e fully withdrawn fromthe ships side in their normal trim; -I n-. the.-latter instance, :thescrew has to be unscrewed only when-the ship is unfavorably listed...The embodiment shown in :Fig, 6 :will bedealt with moreparticularly;hereinafter, -..It will vbe apparent,.,therefore,that-.thepse tot-fill cables ;forthe. aukiliany; beams I, as set forth;in P t n ie-305 7. i no l n e quir dw e using the support screw systemas hereinbefore disclosed, so that the first of the objects of theinvention, as described in the introductory paragraphs of thisspecification, is fully achieved.

A further improvement according to this invention relates to the shapeof the davit 4 (Fig. 3), which has been made sufficiently curved, sothat the davit beam unit keeps bending inboard as in the withdrawn boatinstance of Fig. l (dotted lines). It follows that the boat keepsupright and fully withdrawn from the ships side 6; the boat may begravity tipped outboard when the vessel is on even keel, as gravityslightly prevails in this case, viz., by 5 degrees on the suspensionpoint of the davit head with respect to the rotation axis of davit.Should the ship be unfavorably listed, it will be necessary to actuatethe screw system 2.

From Fig. 3 it will also be seen that when a companion 1 is available,the trestle 3 of Fig. 1 may be dispensed with, and the companion 1serves as a support for the screw system 2. Moreover, the operatingcrank of the screw system 2 may be controlled from the deck [3 throughsuitable transmission members.

A further improvement has been brought about by placing the twoelementary davits 4 of the pair beyond the ends of the boat 5 (Figs. 4and 5). In this case the davit 4 (Fig. 5) is formed by straight tubeswhich are preferably reduced at their end. As in the previousinstances,the beam I is still formed by tubes and is provided with an engagementbracket I9 to keep a proper inclination of davits with respect to thebeam.

The davits according to the improvements are fitted with gravity saddles26 (Fig. 4); Two of V such saddles are provided, to keep the boat 51properly raised at its ends. Each of them comprises a saddle properZBand a forked foot 21 the two branches of which are integral with thesaddle at the top and are pivotally connected to the deck l3 (Fig. 4) attheir lower ends, while a second simple foot 28 (Fig. 4) which ispivoted under the saddle 26, rests on deck I3, where it is stopped by astop 29. Both the forked and the simple foot are properly heldapart'with respect to the vertical direction passing through the centreof the'saddle, so that on removing the stop 23 thesaddle will fall downon the deck I3 owing toits own weight and will leave the boat 5 free toaccomplish its gravity-tipping movement.

Still another improvement according to this invention relates to theoperation of two superi posed boats by means of davits formed by tubesof the kind just described. An embodiment of this improvement is shownin Figs. 6 and '7 and according to this embodiment both of the boats areready to accomplish gravity outboard swinging movements"simultaneously;The lower boat 30 rests'on the. gravity saddles 26 already described,and the upper one 5' rests on the half saddles 3 I, which are supportedby the lower boat 30 and are easily taken away on the fallingdown of thegravity ones. own tackle which serves to lower the'b'oats to Each boatis fitted with its 5 the sea successively, viz. the lower one 30 first,beams adjacent its top, and its other end mountand the upper one 5lines) r In the arrangement shown afterwards (Fig. 6, dotted in Figs. 6and '7, the davits 4 are provided at their bases with forks 4',

and the 'beams I at their bases with forks l,

the davits 4 and beams I lie in the same vertical plane. The screwsystem 2 mounted on the these forks 4 and I- being mounted on the horfiz'ontal pivot 22' so that the longitudinal axes of trestle 3 on thecompanion (Fig. 5) has one end of its rigid rod 2 pivoted on the beam Iand its 7 other end pivoted on its support, the longitudinal axis of therod 2' lying in the common plane of the longitudinal axes of the davits4 and .Trod 20, fitted with a hand crank and supported by a trestle 2|provides for control system 2. V

The screw system 2, when arranged in front of of the screw the beam5,requires a forked support 25 (Figs.

4 and 5), between the two branches of which the davit 4 may swing.

' What'I claim is? In a tipping davit device for life boats, thecombinationiof a pair of davits mounted on horizontal pivots on the deckof the ship, and spaced from each other along-the deck; a pair of beamsmounted on horizontal pivots on the deck, the longitudinal axis of eachbeamflying in the vertical plane in which lies the longitudinal axis ofone of said davits; a block and tackle connection between the upper endof each beam and the upper end of its associated davit; a pair oflongitudinally adjustable, rigid rods, each having one end mounted on ahorizontal pivot on one of the ed on a horizontal pivot on the deck, thelongitudinal axes of the rods lying in the common planes of the axes oftheir respective beams and ANTQN'INO PAMPINELLA.

